Place the dried porcini mushrooms in a small bowl and cover with 1 cup of boiling water. Let them soak for 20 minutes, then chop the mushrooms and reserve the soaking liquid.

In a large Dutch oven or heavy pot over medium heat, cook the chopped bacon until crispy. Remove the bacon with a slotted spoon, leaving the rendered fat in the pot.

Increase heat to medium-high. Add the cubed pork shoulder to the pot and sear until browned on all sides. Remove the pork and set aside with the bacon.

Add the sliced kielbasa and diced onion to the pot. Sauté for about 5-7 minutes until the onions are soft and the sausage is lightly browned.

Stir in the tomato paste and cook for 1 minute. Deglaze the pan with the red wine, scraping up any browned bits from the bottom.

Add the fresh cabbage, sauerkraut, reserved pork and bacon, chopped mushrooms, and the reserved mushroom soaking liquid (careful to leave any grit behind) to the pot.

Stir in the caraway seeds, bay leaves, and chopped prunes.

Cover the pot, reduce heat to low, and simmer gently for at least 60 to 75 minutes, stirring occasionally. The cabbage should be very tender and the flavors melded.

Season with salt and generous amounts of black pepper to taste. Remove bay leaves before serving hot with crusty bread.